Early Detection Species
When new invasive species reach our area we can minimize their impacts through early detection and rapid response (EDRR). Early detection species are invasive plants or animals that are known to have large negative impacts elsewhere in the United States or Midwest, but are not widely distributed or present in Wisconsin. By finding and treating these “new” populations of invasive species while they are small (rapid response), we have a better chance of completely eradicating them and preventing their continued spread. We also reduce the costs of eradication and control in both time and money. Once a species has become widely established, the only action possible is to partially mitigate the negative impacts with available resources.
DCIST has created the following list of plants and animals that pose a threat to Door County’s environment and economy, but are not yet found in the County. Help us prevent them from becoming established by knowing how to identify a few of these species and alerting DCIST or other local natural resource professionals when you see a new plant that is acting aggressively. For information on “prohibited” and “restricted” plant categories, check out our Municipal Ordinances & Laws page.
Invasive Plants Listed as Prohibited in Wisconsin - Not Yet Found in Door County
- Brazillian waterweed (Egeria densa), aquatic plant - Photos - WDNR Link - Factsheet
- European frog-bit (Hydocharis marsus-ranae), aquatic plant - Photos - WDNR Link - Factsheet
- Hydrilla (Hydrilla verticillata), aquatic plant - Photos - WDNR Link - Factsheet
- Parrot feather (Myriophyllum aquaticum), aquatic plant - Photos - WDNR Link - Factsheet
- Water hyacinth (Eichhornia crassipes), aquatic plant - Photos - WDNR Link - Factsheet
- Water lettuce (Pistia stratiotes), aquatic plant - Photos - WDNR Link - Factsheet
- Yellow floating heart (Nymphoides peltata), aquatic plant - Photos - WDNR Link - Factsheet
- Brittle naiad (Najas minor), aquatic plant - Photos - Factsheet
- Fanwort (Cabomba caroliniana), aquatic plant - Photos - WDNR Link
- Oxygen-weed (Lagarosiphon major), aquatic plant - Photos - MISIN Facts
- Hairy willow herb (Epilobium hirsutum), semi-aquatic plant - Photos - WDNR Link
- Tall or reed manna grass* (Glyceria maxima), semi-aquatic grass - Photos - WDNR Link - Factsheet
- Japanese stilt grass (Microsteglum vimineum), semi-aquatic grass - Photos - WDNR Link - Factsheet
- Wild cervil (Anthriscus sylvestris), terrestrial plant - Photos - WDNR Link - MISIN Facts
- Hill mustard (Bunias orientalis), terrestrial plant - Photos - WDNR Link
- Yellow star thistle (Centaurea solstitialis), terrestrial plant - Photos - WDNR Link
- Celandine (Chelidonium majus), terrestrial plant - Photos - WDNR Link
- Poison hemlock (Conium maculatum), terrestrial plant - Photos - WDNR Link
- Giant hogweed (Heracleum mantegazzianum), terrestrial plant - Photos - WDNR Link - Factsheet
- Perennial pepperweed (Lepidium latifolium), terrestrial plant - Photos - WDNR Link
- Sericea lespedeza (Lespedeza cuneata), terrestrial plant - Photos - WDNR Link - MISIN Facts
- Giant knotweed (Polygonum sachalinense), terrestrial plant - Photos - WDNR Link - MISIN Facts
- Spreading hedgeparsley (Torillis arvensis), terrestrial palnt - Photos - WDNR Link - MISIN Facts
- Japanese hedgeparsley (Torillis japonica), terrestrial plant - Photos - WDNR Link - Factsheet
- Porcelain-berry (Ampelopsis brevipedunculata), vine - Photos - WDNR Link - Factsheet
- Chinese yam (Dioscorea plystachya), vine - Photos - WDNR Link - Factsheet
- Japanese hops (Humulus japonicas), vine - Photos - WDNR Link - Factsheet
- Japanese honeysuckle (Lonicera japonica), woody vine - Photos - WDNR Link - Factsheet
- Mile-a-minute vine (Polygonum perfoliatum), vine - Photos - WDNR Link - Factsheet
- Kudzu (pueraria montana), semi-woody vine - Photos - WDNR Link - Factsheet
- Pale swallow-wort (Vincetoxicum rossicum), vine - Photos - WDNR Link - Factsheet
- Scotch broom (Cytisus scoparius), shrub - Photos - WDNR Link
- Wineberry (Rubus phoenicolasius), shrub - Photos - WDNR Link - Factsheet
- Princess tree (Paulownia tomentosa), tree - Photos - WDNR Link - Factsheet
- Sawtooth oak (Quercus acutissima), tree - Photos - WDNR Link - MISIN Facts
- Tree of heaven (Ailanthus altissima), tree - Photos - WDNR Link - Factsheet
- Faucet snail (Bithynia tentaculata), aquatic animal - Photos - Facts
- Asian clam (Corbicula fluminea), aquatic animal - Photos - Facts
- Water flea (Daphnia lumholtzi), aquatic animal - Photos - Facts
- Chinese mitten crabs (Eriocheir sinensi), aquatic animal - Photos - Facts
- Bloody shrimp (Hemimysis anomala), aquatic animal - Photos - MISIN Facts
- New Zealand mud snail (Potamopyrgus antipodarum), aquatic animal - Photos - WDNR Facts - Facts
- Hemlock woolly adelgid (Adelges tsugare), terrestrial animal - Photos - WDNR Link- MISIN Facts
- Asian longhorned beetle (Anoplophora glabripennis), terr. animal - Photos - WDNR Facts - MISIN Facts
- Asian gypsy moth (Lymantria dipar Asian race), terrestrial animal - Photos - Facts
- Sudden oak death pathogen (Phytophthora ramorum), plant disease - Photos - WDNR Link - Facts
*A single occurance of Glyceria maxima was found in Door County in late 2017 and was subsequently treated through the Door County Soil & Water Conservation Department.